Cut 8 slices of the bread at a very diagonal angle (approx. 20 g each). Use the rest of the bread for other purposes. Toast the slices of bread, take them out and let them cool down. Mix sour cream and barbecue sauce, season with some salt.
Wash the meat, dab dry. Heat the oil in a frying pan. Fry the meat for 1-2 minutes on both sides, season with salt and remove. Peel the pineapple, cut out the hard stalk, cut the flesh into thin slices.
Spread slices of bread with 1-2 teaspoons of sour cream sauce each and cover with 1 meat and 2-3 pineapple slices each. Remove the rind from the cheese slices, cover each slice of bread with 1 slice of cheese and place on a baking tray.
Gratinate under the preheated grill of the oven for 3-4 minutes. Take out the breads and arrange each with 1 cocktail cherry on 4 plates.